Electric heating apparatus



Feb. 10, 1925. 1,525,318

A. MACHA ELECTRIC HEATING APPARATUS Filed Dec. 9, 1922 WITNESS IN VEN TOR.

BY m am ATTORNEY Patented Feb. 10, 1925.

UNITED STATES PATENT OFFICE.

AUGUST MACHA, 0F CLEVELAND, OHIO, ASSIGNOR TO THE ELECTRIC CONTROLLER & MANUFACTURING COMPANY, OF CLEVELAND, O'I-IIO, A CORPORATION OF OHIO.

ELECTRIC HEATING APPARATUS.

Application filed December 9, 1922.

To all whom it may concern.

Be it known that 1, AUGUST MAoHA, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented new and useful IIUPIOVQHIBIltS in Electric Heating Apparatus, of which the following is a specifi cation.

My invention relates to apparatus for electrically heating articles to be welded or soldered together or to be heated for other purposes.

It is the object of this invention to provide an electromagnetically-operated clamp whose jaws or contact faces are electrodes for articles to be welded or soldered, or to be heated for other purposes. Another object is to provide such a clamp in combination with means for controlling the supply of current to the magnet winding and t0 the transformer inserted between the said means and the electrodes.

The drawing shows diagrammatically an apparatus embodying the principles of my invention.

C designates an electromagnetic clamp having the movable member 1 carrying the jaw or contact 2 arranged to clamp articles to be heated between itself and the fixed jaw or contact 3, one such article 4 being shown gripped by the clamp. The clamp members 2 and 3 are connected respectively to the terminals of the secondary winding :3 of the transformer T by the wires 6 and 7. The member C has the core 8 energized by the winding 9 connectible by the button-switch B having the movable member 10, to the wires 11 and 12, supplied by alternating electric current from the supply lines 13 and 14 by the two-pole line switch 15. The button switch is pivoted at 16 between its ends, and has the button 17 on one side of the pivot 16 for opening the switch, and the button 18 in the other side of the pivot for closing the switch.

The wires 11 and 12 are connected to the fixed contacts 19 and 20 of the doublepole electromagnetic contactor S, which has the two pivoted contact members 21 and 22 insulated from. each other and engageable respectively with the contacts 19 and 20. The members 21 and 22 are connected by the wires 23 and 24 to the terminals of the primary winding 25 of the transformer T Serial No. 605,949.

preferably through a switch B, having the adjustable contact 26 engageable with any one of a number of taps 27 from the winding 25. The contact-or members 21 and 22 are connected together pivotally by the link 28, and the member 21 has the magnet core 29 energized by the winding 30, which receives current from the wires 11 and 12 by the wire 31 containing the master switch F, having the movable member 32, closable by the foot of the operator pressing on the button 33 and opened by any suitable means, as by the spring 34.

The contacts 2 and 3 and article 4 may be cooled by a. current of air from the pipe 35 having the air-controlling valve 36.

To operate my invention, the line switch 15 is closed whereby potential is supplied to the fixed contacts of the switches B, F, and S. The article 4 to be heated is placed between the jaws 2 and 3 of the clamp, care being used to ensure that the article is in the proper position to make good contact. The switch 10 is then closed, whereby current is caused to flow from the wires 11 and 12 through the winding 9. Current in this winding causes the clamp member 1 to move so as to clamp the article 4 between the jaws 2 and 3. Then the operator closes the switch F by his foot, thereby closing the circuit of the winding 30. Current in this winding causes the switch S to close, thereby supplying current from the wires 11 and 12 to the primary winding 25 of the transformer T, whose secondary winding 5 supplies current which flows through the wires 6 and 7, the jaws 2 and 3 of the clamp C, and the article 1. When the article is sufficiently heated by the current flowing through it, the operator may cause the current to cease by removing his foot from the switch F. The switch B is then opened to release the article 1 from the clamp C when the article is cool enough to handle. The switch R is preliminarily adjusted to provide the proper amount of current for the size of the article 4, or the amount of current required to raise the article to a certain temperature.

I claim In an apparatus for electrically heating articles, a contacting device having its contacts adapted to clamp between them articles to be heated, a winding which when energized will move the contacts toward each circuit with the 'o0ntacts"Of the device,

a contactor"to-connect-a* source of cur-rent t0 the primary Winding of the transformer,

a Winding which when energized closes the confide of -the"foontaetor,'and' a Switch to conheet the Source with the 's'ee'ondwinding. 10

'In'testimony whereof I hereunto afliX my signature this 5th day of December, 1922.

AUGUST MAGHA. 

